If you have been looking for a game that has a lot of action then this is the free online action game that you should play. It is a story about an invasion high up in the mountains; the invaders are aliens and they look very creepy. There are several types of enemy that you must watch put for. The first is the small crawling aliens, and the second is the rolling ball that has an alien for a driver. In this game, you should shoot at anything and it will react. For example, if you want to use a rock to cross over a chasm, then you can shoot the rock and it will fall over the chasm and you can cross. If you step on a tree trunk, you can use it as a lever. You should shoot at all rock because some of the creepy crawlies hide behind them. You control the character using the WASD keys and then you aim and shoot with the mouse. At each level, you will be letting a different kind of boss, and he will be stronger than the last; make sure that you get upgrades, and as you go along, you should collect as many helpful items as you can. The balls that turn into machines with an alien inside will shoot at you so you have to be very fast with moving the character. The game can be challenging for those who are not used to the WASD, but with practice, they will get better. Apart from the aliens, there are enemy soldiers, who probably brought the creatures to the planet, and you have to kill them. Every time you hit one, he glows red; the same happens to you if you get hit. Ensure that you keep your health high by being fast in action and thought.